<ion-view ng-controller="ion_titlePre" view-title="{{title}}">
    <ion-nav-buttons side="right">
        <button class="button button-clear button-balanced" ui-sref="book.recommend">书循</button>
    </ion-nav-buttons>
    <ion-content class="padding">
        <pre ng-bind="pre"></pre>
    </ion-content>
</ion-view>